Shoiji Kobayashi is a name associated with the Japanese actor Akiji Kobayashi, who was sometimes credited under that spelling. Born on September 6, 1930, in Tokyo, he studied at the Nihon University College of Art before leaving to join the Haiyuza Theatre Company in 1949, beginning his career in entertainment. He made his film debut in 1952 and remained active in the industry until his death in 1996.

Kobayashi was primarily known as a live-action actor, achieving iconic status for his roles in tokusatsu productions. He is most famous for portraying Captain Toshio Muramatsu in the original 1966 television series Ultraman, a role that made him a beloved figure in Japanese pop culture. He also played the recurring character Tobei Tachibana, a mentor figure, in the early Kamen Rider series throughout the 1970s. His film work was extensive, including appearances in acclaimed movies such as Harakiri, Youth of the Beast, Kwaidan, and later, Godzilla vs. King Ghidorah.

While his on-screen work was prominent, Kobayashi also had a significant career as a voice actor, particularly in dubbing foreign films. He was well-known as the official Japanese dubbing voice for the American actor John Wayne, providing the Japanese voice for the star in numerous movies. He also dubbed other actors like Richard Crenna.

In the realm of anime, one of his notable voice roles was as the lead character in the 1979 television special Jean Valjean Monogatari, an anime adaptation of Victor Hugo's Les Misérables. This performance stands as a key example of his work in animated productions. His career was marked by a high volume of work across both live-action and voice acting, leaving a lasting legacy in Japanese entertainment through his memorable and authoritative performances. Akiji Kobayashi passed away on August 27, 1996.